Refillable plug.



R. A. SCHOENBERG.

Now BY IuDIcIAL CHANGE or NAME II. A. BELMONT.

REFILLABLE PLUG.

APPLICATION FILELLIUNILIB, 1911.

1,265,391 Patented May 7,1918.

UNITED STATES PATENT oEEIoE.

,RALPH A. SCHONBERGgIN 0117i` IBYJ 'II'IIIGIAI'J'GHAJNG'EfOFil NAME RALPH A. BELMONT) or NEW Yoan, N. Y.

nEEiLLABLE Entre.

,`@einenneuesten. [pasanta a, '1918.

application nieuwe 1e, 1917. serial No. 175.250.

TaaZZ whom t may concemr;

Be it known that `I,RAI.T H A. SQHOElT-l BERG, (now by. judicial .changef .name RALPH A. BELMONT,) offNew Yorkflnthe county and State of 'New York,;haYe"f.1I1 ventedy new vand A'useful Improvements 1 n a Refillable Plug, of which the followmg 1s a specification.r n e M invention [is `in part anlvmprovement of this device of myf patent issued fMay jl, 1917, No.`1,224,505 in which I show a metal shell with a ber lining and insulating 4washers for theA centerkcontact andfmyv present invention contemplates adaptation; to .a `rellable fuseyplug so that a great saving of material by reason of the factthat'only the fuse wire needs be thrown away. y.

Afeature of my invention is a removable cap to 've accessto the interior of the plug.

Anot er feature is av center contacty adjust.- able for the application of a new fuse4 wire.

Another feature'is a `hole'in the center contact for passage of `thefuse wire. l c v,

Another feature is a barrier to insulate the fuse wire. o. .I

Another feature is that the screw yshell carriesa screw contact. c

Another feature is a collar for use in holding the cap or cover in position. e

Another feature is the lightness of ythe structure which is particularly important in shipping and in connection with customs of foreign countries where duty is charged'by weight.` v c `Other features will be pointed out below.

In the drawings: c y,

Figure 1 is a central longitudinal sectional view of a fuse tion; l

. Fig. 2is a plan of the innermost washer;

Fig. 3 is an end elevationk of the screw shell;

Fig. 4 is a plan view of the intermediate washer:

Fig. 5 is a section on line5.?5 of Fig. 6;

Fig. 6 is a section on line G-('cf. Fig. l;

is a plan view of the outer washer;

Fig. 8 is a plan view of the metal sta le formlng part of the center contact showing plug embodying. my inven- `g,Fig..12;isamodification;and f I 5 ...Figy 13; shows another fornajof center contact.;.

The body-@fthe fuseplllg iS hollow and consists Aof avthreaded metallic; shell IAfwith imL yannular shollldald. and` alli Outturnd .Hanse at itsuter endend aninturned fmnulariange dat. itsk inner end; ,flange e bengprovided wthfgrooves @2.120 pernutthe escapeofgas, the interiorafeange azbeing square toreceivekand enga e a `washerrherenafter described., A. -tumlar insulating Blof b11 -.r. similar ,material is. PFO- vide and is cutaway..atb..f9r the Gentech membelwhereinafer dwcrbed. ,Insulating member vI) n. prevents a shockto the Auser being 4located. between` the shell and metallic collar VVE, the latterbeing formed as Shown to @lamp memberD aninsulating member F ito the l oui-turned flange` of the shell, said collar havin A@any` extension c threaded .Wto.engagethreay ed cap. G, the lattel having all Openingggverin Which iS a' micadisk `g,cso thatfthe interlor of the device may be seen, the. cap preventing the' escape of gases at theouter lend lof the plug but being readily applied and readilyremoved, to give access to the interior of the plug for insertion of anew fuse. Y

At the centerV contact end ofthe plu vI provide inner insulating washer I-I re r- .ably-foflfber having apertures hey/I1. or the lefgs of `the center contact member hereina ter described, `aperture It? for the` screw and .aperturev '11.3 for vthe .fuse wire, vthe inner washer being slightly spaced lfrom the plug liningffor the passage of gas.

Intermediate insulating. washer K, preferably of fiber, is squareand yfits the `opening in flange a2 and is cutaway aik 'c to permit the passage` of gas. Washer K has apertures kik for the legs of the center contactv mein' ber, aperturef:2 for the'screwvand aperture las for the fuse wire. v j,

Outer insulating washer `M is .preferably of mica and engages the outer facef of flan e l .aperture fn g incassi washer lid, the paper washer having an 'ith a side portion for the same es he aperture of washerll/l.

e Contact member has a dat porti i p, a central raised portion p with a threaded aperture p2, a pair of legs p3 p3 and an aperture or hole p4 for passage ot the fuse wire, said raised portion fitting closely against washer N and reinforcing the latter l and said legs passing through washers H,

l, M and N to the position shown in dotted l lines in Fig. 5 and then beingclenched as shown in full lines in Fig. 5.

Binding screw R is threaded to engage the threading of aperture p2 and holds one end of the fuse wire S in place, the head of the binding screw being wide enough to cover the hole p* in portion p and the binding screw being adyustable to permit the removal of the blown fuse wire and the inser- 1 tion of and engagement with a new one.

F use wire S passes from the center con-4 tact through hole p4 and through the appropriate apertures of washers N, M, K and H and is deflected at the insulating barrier T, extending thence into contact with contact T Where it is held by binding screw t, said contact Tf having prongs t t which are bent around the barrier to hold it in position, contact- T8 passing through portion b' and having prongs. t2 t2 vwhich are riveted to shell A, the riveting being covered by in.

sulating member D.

' In Fig. l2 l show an clon ated form of plug having cap G collar insulation D, shell A, washers M and N', center contact member p5 and binding screw R, all similar to the 'form ot Fig. l, the main difference being in the length of shell, this long form ofshell being largely used in tor-v eign countries and illustrates the great saving due to my invention because with myl invention the plug may be refilled, thus avoiding the throwing away oi" expensive material.

ln Fig. l2 l show another form of means` to cover the hole for the passage of the inse wire through the center Contact member and for many purposes l prefer this means which comprises a standard screw head R2 holding in place a washer p which covers said hole.

What l claim is:

l. A rellable plug comprising a center contact; a shell; insulating material between the center contact and shell yand provided with a passage sepa-rate from the opening for the center contact; and a fuse wire connected with said shell and extending throughsaid passage and connected tosaid center' contact, g

2. A device of the character described comprising a shell; a .center contact; a fuse wire connected to the center contact and a plurality of washers insulating said contact from said shell, said center contact having lugs passing through said washers and holdin t thpassage of the fuse wire.

3- A devicey of the character described comprising a shell; a contact fastened to said shell; and an insulating barrier supported by said contact.

4. A refillable plugl having a metallic screw shell; a fuse wire; a terminal contact for connecting the fuse wire to said screw shell; and a metallic collar insulated from but fastened-to, the screw shell; and a screw cap for engaging said collar for opening the plug to insert a new fuse. Y

5. A rellable plug having a center contact; a screw shell; a contact riveted to the screw shell, said screys7 shell formin the body of said plug and havin an insulting em in position, and having a. hole for lining within 1t; a collar-insu ated from, but" connected to, said screw shell; anda cap engaging said collar. 6. A terminal contact for a reillable lu consistin of a washer with projecting ugs to h old 1t to the plug and with a screwthreaded aperture 1n its center and having a hole alongside' of said center threaded aperture for the passage of a fuse wire; and a screw -for fastening said wire to said washer. 7. A relillable fuse plug having a shell; a fiberlri near the top periphery of the shell; a li er washer placed between the liber ring and the top of. the screw shell; a second insulating washer placed on top ot first washer; a screw threaded collar holding the two washers in position; and a threaded cap to engage said threaded collar.

' sion.

9. A rellable plug .comprising a shell; a center contactv having legs and a binding screw; a fuse connected to said center con@ tact outside of the plug; and material in sulating said center contact'ilrom said shell, said material including an inner washer apertured for said legs, said screw and said wire; an intermediate washer similarly apertured; and an outer washer similarly apertured, said legs passing through said washers and holding said insulating material in place.

' einen a. scnonnnnne, Now by judicial change of name Ralph fl.

Bement.

lll 

